Molten metal treatment device for gas atomization powder preparation

Abstract

The utility model relates to a molten metal treatment device for gas atomization pulverization, which belongs to the technical field of gas atomization pulverization, and comprises a tundish crucible assembly, a molten metal treatment device and a gas atomization pulverization device, the tundish crucible assembly comprises a tundish crucible shell and a tundish body arranged in the tundish crucible shell, the top end of the tundish body is connected with a pouring gate, and the pouring gate is constructed to be funnel-shaped; the molten metal container is arranged on one side of the tundish crucible assembly and comprises a container body; one end of the overflow pipe is communicated with the side wall of the pouring gate, and the other end of the overflow pipe extends downwards and is communicated with the container body. According to the molten metal treatment device provided by the utility model, the molten metal in the smelting crucible can be continuously poured into the pouring gate when the ladle is blocked, and the molten metal flows into the molten metal container through the overflow pipe when the molten metal reaches the height of the overflow pipe, so that the molten metal pouring operation is uninterrupted, the operation safety is ensured, and the production efficiency is improved. And meanwhile, molten metal in the smelting crucible can be discharged in time, and the sintering condition of the crucible can be observed in time.

Description

Technical Field

[0001] The utility model relates to the technical field of gas atomization powder making, in particular to a metal liquid processing device for gas atomization powder making. Background Art

[0002] The current production process of vacuum induction melting gas atomization powder making equipment (VIGA) is as follows: under a vacuum environment, the molten metal is melted in a melting crucible, and then continuously poured into a tundish through a tilting device. The molten metal flows into the atomization chamber through the holes at the bottom of the tundish. The tundish holes cooperate with the atomizer. The molten metal flows through the tundish and passes through the atomizer. It is broken into powder by the high-pressure inert gas of the atomizer, and then cooled and collected in the atomization chamber.

[0003] The first furnace bakeout can easily lead to problems with the tundish due to poor molten metal fluidity or non-metallic impurities such as dry vibrating material that fall into the tundish, causing blockage and failure to atomize properly. Furthermore, molten metal can remain in the crucible, making it impossible to observe the crucible's sintering condition (whether it is poorly sintered, cracked, or corroded). If safety hazards are not eliminated and a secondary melt is continued, steel may leak out during the melting process, or even burn through the coil, leading to a serious safety issue such as furnace explosion. Therefore, the crucible's sintering condition must be confirmed after the first furnace bakeout is completed.

[0004] On the other hand, the tundish leakage hole generally adopts an aperture of 4-7mm. When encountering unexpected situations such as the molten metal of the furnace material having a slightly high impurity content, poor fluidity, high cooling rate, and molten metal splashing and blocking the leakage hole, the molten metal cannot be atomized into powder. However, due to safety reasons, the melting crucible must be inspected or repaired, or even smashed. In this case, the molten metal in the crucible that cannot be atomized becomes an obstacle. Utility Model Content

[0005] The purpose of the utility model is to provide a molten metal processing device for gas atomization powder making, which can solve the problem mentioned in the background art that the residual molten metal makes it impossible to check the sintering condition of the crucible.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a molten metal processing device for gas atomization powder making, comprising a tundish crucible assembly, a molten metal container and an overflow pipe, the tundish crucible assembly comprising a tundish crucible shell and a tundish body arranged in the tundish crucible shell, the top of the tundish body being connected to a gate, and the gate being constructed in a funnel shape; the molten metal container being arranged on one side of the tundish crucible assembly, comprising a container body; and an overflow pipe, one end of the overflow pipe being connected to the side wall of the gate, and the other end extending downward and connected to the container body.

[0007] In a preferred embodiment, the gate is detachably connected to the top of the tundish body to facilitate the reuse of the gate.

[0008] In a preferred embodiment, the tundish crucible assembly further comprises a heating assembly for heating and keeping the tundish body warm.

[0009] In a preferred embodiment, the molten metal container includes a box shell, and the container bodies are provided in multiple groups and are arranged at intervals in the box shell.

[0010] In a preferred embodiment, adjacent container bodies are connected with flow channels.

[0011] In a preferred embodiment, a heat insulation layer is provided around the container body.

[0012] In a preferred embodiment, the container body is designed as a casting mold, the bottom of which is narrower than the top.

[0013] In a preferred embodiment, the overflow pipe is made of corundum.

[0014] On the other hand, the present invention further provides an aerosolized powder making device, comprising the molten metal processing device described in any one of the above solutions.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The molten metal processing device provided by the utility model is provided with a molten metal container and an overflow pipe between the pouring mouth and the molten metal container. When a blockage occurs, the molten metal in the melting crucible can continue to pour into the pouring mouth. When the molten metal reaches the height of the overflow pipe, the molten metal will flow into the molten metal container through the overflow pipe. Such a setting can make the molten metal pouring operation uninterrupted, ensure the safety of the operation, and at the same time can timely discharge the molten metal in the melting crucible and timely observe the sintering condition of the crucible.

[0017] 2. The molten metal container is provided with a pouring mold so that the molten metal poured into the molten metal container can be re-used as raw material for smelting and powdering after cooling, which will not cause waste of raw materials. The molten metal container has a simple structure and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a molten metal processing device for gas atomization powder production in an embodiment of the present utility model;

[0019] Figure 2 This is a schematic structural diagram of the tundish crucible assembly in an embodiment of the present utility model;

[0020] Figure 3This is a schematic structural diagram of a molten metal container in an embodiment of the present utility model;

[0021] Figure 4 This is a top view of a molten metal container in an embodiment of the present utility model;

[0022] The meaning of each number in the figure is:

[0023] 1. Tundish crucible assembly; 11. Tundish crucible shell; 12. Tundish body; 13. Gate; 14. Support bottom plate; 15. Enclosure; 16. Induction heating coil; 17. Graphite heater; 18. Draft tube; 19. Insulation plate; 2. Molten metal container; 21. Box shell; 22. Container body; 23. Insulation layer; 24. Stream flow channel; 25. Refractory plastic; 3. Overflow pipe; 4. Atomizer; 5. Melting crucible. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] This embodiment discloses a molten metal processing device for gas atomization powder production. This device is particularly suitable for the following situations: molten metal exists in the smelting crucible 5, but it cannot be normally atomized into powder, and the smelting crucible 5 must be inspected, repaired, or scrapped. For example, for example, the smelting crucible 5 has been used for nearly its average service life and has become clogged during use, requiring an internal inspection of the smelting crucible 5 for safety reasons; or the smelting crucible 5 has reached scrap requirements, but a clog has occurred in the furnace molten metal, resulting in molten metal remaining in the smelting crucible 5; or the first batch of metal baking charge has clogged, and if this is not repaired, the sintering condition of the smelting crucible 5 cannot be inspected.

[0027] See also Figure 1The molten metal processing device for gas atomization powder production includes a tundish crucible assembly 1 and a molten metal container 2. The tundish crucible assembly 1 includes a tundish crucible shell 11 and a tundish body 12 disposed within the tundish crucible shell 11. A pouring nozzle 13 is connected to the top of the tundish body 12. The molten metal in the smelting crucible 5 flows into the tundish body 12 through the pouring nozzle 13. An overflow pipe 3 is connected between the pouring nozzle 13 and the molten metal container 2. When a tundish blockage occurs, the molten metal in the smelting crucible 5 can continue to pour into the pouring nozzle 13. When the height of the molten metal reaches the height of the overflow pipe 3, the molten metal will flow into the molten metal container 2 through the overflow pipe 3. This arrangement allows the molten metal pouring operation to be uninterrupted, ensuring operational safety. It also allows the molten metal in the smelting crucible 5 to be discharged in a timely manner, allowing for timely observation of the sintering condition of the crucible.

[0028] Specifically, the tundish crucible shell 11 encloses a crucible cavity, the tundish body 12 is disposed within the crucible cavity, and the pouring spout 13 is detachably connected to the top of the tundish body 12 to facilitate reuse of the pouring spout 13. In this embodiment, the pouring spout 13 is constructed in a funnel shape, with the inner diameter of its bottom end matching the inner diameter of the top of the tundish body 12. A snap is provided on the outer annular surface, which is fastened to the top of the tundish body 12 using the snap during installation and sealed with refractory clay. The overflow pipe 3 is fixedly connected to the side wall of the pouring spout 13, one end of which is connected to the inner cavity of the pouring spout 13, and the other end extends downward and is connected to the cavity of the molten metal container 2. When the molten metal reaches the height of the overflow pipe 3, the molten metal will flow into the molten metal container 2 through the overflow pipe 3 under the action of gravity. In this embodiment, the overflow pipe 3 is preferably made of corundum with high hardness and high temperature thermal shock resistance to ensure its service life.

[0029] like Figure 2 As shown, the tundish crucible assembly 1 further includes a heating assembly for heating and maintaining the tundish body 12. Specifically, a support base plate 14 for thermal insulation is provided at the bottom of the crucible cavity, and the heating assembly is connected to the top of the support base plate 14. In this embodiment, the heating assembly includes a panel 15 having the same shape as the tundish crucible shell 11, enclosing a cavity structure with an open top. An induction heating coil 16 is provided around the periphery of the panel 15, and a graphite heater 17 is provided within the cavity of the panel 15. The lower and middle portions of the tundish body 12 are seated within the graphite heater 17. In this embodiment, the panel 15 is preferably a mullite insulation board to protect the coil. The heating assembly can heat and maintain the molten metal within the tundish body 12, accurately controlling the temperature of the molten metal within the tundish body 12. Preferably, the top of the tundish crucible shell 11 is also covered with an insulation board 19, with a central through-hole provided for the passage of the gate 13.

[0030] Preferably, the tundish body 12 is constructed in a truncated cone shape, that is, the outer diameter of its top end is larger than the outer diameter of its bottom end. The inner cavity of the graphite heater 17 is adapted to the shape of the tundish body 12, and a gap is left between the tundish body 12. This arrangement makes it easy to remove the tundish body 12 from the graphite heater 17 and prevents the tundish body 12 from expanding due to heat and causing it to get stuck.

[0031] The bottom of the tundish body 12 is fixedly connected to a guide pipe 18, which passes through the graphite heater 17, the surrounding plate 15, and the supporting bottom plate 14 in sequence, and extends from the bottom of the tundish crucible shell 11. The molten metal in the tundish body 12 is discharged through the guide pipe 18 and cooperates with the atomizer 4 below to perform atomization operation.

[0032] Combine Figure 3 and Figure 4 The molten metal container 2 is disposed on one side of the tundish crucible assembly 1 and includes a housing 21 and a plurality of interconnected container bodies 22 disposed within the housing 21. Both the housing 21 and the container bodies 22 are made of a high-strength material resistant to high-temperature deformation, such as carbon steel or alumina. The container bodies 22 are surrounded by a thermal insulation layer 23. Adjacent container bodies 22 are connected by a flow channel 24, which connects the adjacent container bodies 22. The overflow pipe 3 is connected to the container body 22 at the side. When the container body 22 at the side is filled with molten metal, the molten metal automatically overflows to the next container body 22 through the flow channel 24, and so on.

[0033] Preferably, in this embodiment, the container body 22 is constructed as a casting mold so that the collected molten metal can be fully utilized. The shape and size of the casting mold can be specifically set according to actual needs. Specifically, the box shell 21 is constructed as a rectangular container with an open top. After the box bottom is knotted with dry vibration material in the same way as a crucible, the open casting molds are placed in the box at intervals. Then, the insulation layer 23 is knotted around the casting mold in the box, and the knot is tied to a height slightly lower than the casting mold by 8-12 mm. The top is sealed with a refractory plastic 25. The refractory plastic 25 between adjacent casting molds is provided with multiple flow channels 24 for connecting the two casting molds. The flow channels 24 are used for the flow of molten metal.

[0034] In this preferred embodiment, the bottom of the casting mold is slightly narrower than the top, facilitating its removal from the housing 21. The inner wall of the casting mold is coated with a release agent, facilitating demolding of the cast body. The finished molten metal container 2 is hoisted directly to a cooling area for isolation and cooling. Once the casting mold has completely cooled, it is removed and stored for subsequent smelting and powder production.

[0035] If the molten metal atomizes normally, pour the molten metal normally. If the molten metal is blocked, continue pouring the molten metal slowly until it overflows the overflow pipe 3 of the pouring gate 13 and flows into the molten metal container 2 through the overflow pipe 3. After pouring the molten metal, check the sintering condition of the melting crucible 5 normally and determine the next step based on the sintering condition.

[0036] The molten metal processing apparatus provided in this embodiment, by providing a molten metal container 2 and an overflow pipe 3 between the pouring port 13 and the molten metal container 2, allows continued pouring of molten metal even in the event of a blockage, allowing the molten metal to be directed through the overflow pipe 3 into a reserved container. This eliminates the risk of damage to the smelting crucible 5 being obstructed by blockage, thereby reducing safety hazards associated with the inability to inspect and repair the crucible during production due to unexpected circumstances. Furthermore, the molten metal poured into the molten metal container 2 can be reused as raw material for smelting and powdering after cooling, eliminating the waste of raw materials. Furthermore, the molten metal container 2 is low-cost and simple to manufacture.

[0037] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A molten metal processing device for gas atomization powder making, characterized in that: include: A tundish crucible assembly (1) comprises a tundish crucible shell (11) and a tundish body (12) disposed in the tundish crucible shell (11); a top end of the tundish body (12) is connected to a pouring gate (13); and the pouring gate (13) is configured in a funnel shape. A molten metal container (2) is arranged on one side of the tundish crucible assembly (1) and includes a container body (22); An overflow pipe (3), one end of which is connected to the side wall of the gate (13), and the other end of which extends downward and is connected to the container body (22).

2. The molten metal processing device for gas atomization powder production according to claim 1, characterized in that: The gate (13) is detachably connected to the top of the tundish body (12).

3. The molten metal processing device for gas atomization powder production according to claim 1, characterized in that: The tundish crucible assembly (1) further comprises a heating assembly for heating and keeping the tundish body (12) warm.

4. The molten metal processing device for gas atomization powder production according to claim 1, characterized in that: The molten metal container (2) comprises a box shell (21), and the container bodies (22) are arranged in multiple groups and spaced apart in the box shell (21).

5. The molten metal processing device for gas atomization powder production according to claim 4, characterized in that: Adjacent container bodies (22) are connected with a series flow channel (24).

6. The molten metal processing device for gas atomization powder production according to claim 4, characterized in that: A heat insulation layer (23) is provided around the container body (22).

7. The molten metal processing device for gas atomization powder production according to claim 4, characterized in that: The container body (22) is configured as a casting mold having a bottom narrower than a top.

8. The molten metal processing device for gas atomization powder production according to claim 1, characterized in that: The overflow pipe (3) is made of corundum.

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